In the necklace why dose mathilde barrow madame forestier

As the day of the party approaches, Mathilde starts to behave oddly. She confesses that the reason for her behavior is her lack of jewels. Monsieur Loisel suggests that she wear flowers, but she refuses. He implores her to visit Madame Forestier and borrow something from her.

She is say he is the same person, and he is to be treated the same. and he acts the same way.